"HONG KONG (Reuters) - Cockroaches have a memory and can be taught to salivate in response to neutral stimuli in the way that Pavlov's dogs would do when the famed Russian doctor rang his bell, Japanese researchers found.

Such "conditioning" can only take place when there is memory and learning, and this salivating response had only previously been proven in humans and dogs."

http://news.yahoo.com/s/nm/20070613/sc_nm/cockroaches_learning_memory_dc

Next question: How do you tell when a cockroach is salivating? smile

If you don't care for reality, just wait a while; another will be along shortly. --A Rose